Don't emit updatedObject(-1) anymore if an object gets deleted. Use the slot...

Don't emit updatedObject(-1) anymore if an object gets deleted. Use the slot objectDeleted from LoadSaveInterface instead.

closes #1293



git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@15846 383ad7c9-94d9-4d36-a494-682f7c89f535